Drilling-machine.



C. B. RICHARDS,

DRILLING MACHINE.

APPLICATION FILED 13110.3,1908.

Patented Aug. 24, 1909.

INVENTOR vWITNESSES UNI TED STATES PATEN T OFFICE.

CLEVELAND ROCK DRILL COMPANY, OF

} CHARLES B. RICHARDS. OF CLEVELAND, OHIO, ASSIGNOR, BY 'MESNEASSIGNMENTS, TO THE CLEVELAND, OHIO, A CORPORATION OF OHIO.

DRILLING-MACHINE.

Specification of Letters Patent.

Patented Aug. 24, 1909:.

Application filed December 3, 1908. Serial No. 465,793.

To all whom it 'may concern:

Bc it known that I, (IIARLEs B. lticuanns, a (iti7en oi the UnitedStates, residing a tlevcland, in the county of (uyahoga and State ofOhio, have invented certain new and useful improvements inDrilling-Machines, of which the following is a specification.

The invention has relation to rock drills, and particularly to the meansof sur'iplying iluid to rock drills to clean the hole being drilled. Theinvention has for its primary object: The provision of a simpleconstruction of iiuid supplying mechanism, wherein the parts are held inposition by the action of the drill, and wherein the provision of allscrew or threaded joints, and nuts and bolts is dispensed with. Myinvention is illustrated in preferred form in the accompanying drawing,which is a longitudinal section "of the fluid supplying means as appliedto a "rock drilling machine of the reciprocating type.

I It has been common to provide rock. drills with fluid su plying means,but the means usually empl dyed have contained divided parts, such forexample, as split water rings, which were either screw threaded togetheror clam )ed together by means of nuts and bolts. he constant vibra tionand jar of the machine makes it diiiicult to keep a threaded jointtight, and my device is designed to overcome this obstacle.

In carrying out my invention, it will be seen by reference to the(.rawing, that I provide a chuck 1 of the usual 'l'orm employed inreciprocating rock drills, in which is -mounted in the usual manner adrill steel 2,

which has, at a short distance from its chuck end, a tapered section 3,upon which is carried a tapered sleeve This sleeve 4 is also tapered onthe outside and carries in turn another tapered sleeve 5, upon which isrevolubly mounted a lluid admission ring 6, provided with suitablerubber packing rings or gaskets 7 7 and with an opening, 8, screwthreaded to receive the end ofa hose or other connection from the mainsource of fluid supply. The sleeves 4 and 5 are respectively providedwith collar or shoulder portions 9 and 10, which constitute, when theparts are assembled, a retaining means for the lluid admission ring, (iand prevent any longitudinal movement thcrcol'.- The admission ring 6 isfree to rotate between these collar portions 9 and 10, and thus preventsthe connection to the main fluid supply from twisting, when the chuckand drill are turned during the drilling operation.

By the revision of the tapered section 3 of the drilli the taperedsleeves 4 and 5, and the collars 9 and 30, a means is supplied forholding the various parts of the device in position, independent of anyadditional holding means; for the impact or" the drill steel against therock being drilled, forces the sleeves 4 and 5 forwardly, causing themrespectively to iirnrly grip the tapered section 3 of the drill, and thesleeve 4. Since, on the rearward movement, the chuck and drill arecushioned in the machine in the usual manner, the impact is not so greatas observed that the outside taper of the sleeve j4 is sharper than thatol' the tapered section 30f the drill, thus causing the sleeve 5 to holdmore tightly than does the sleeve 4 on.

thedri-l-l, and allowing the device as a whole to be knocked from thedrill when itis desired to remove. or replace the latter.

Referring to the means of supplying water or other suitable fluid to theent of the drill,

it will be seen that I. provide a port 11 leading from the screwthreaded portion 8, above referred to, to a circumferential passage 12winch is formed wlthm the admissron ring 6,

and from which there is a port 13 leading to a similar passage 14 formedin the'sleeve 5.

This passage 14 is connected by a port .15 to a passage 16 formed in thesleeve 4, which passage is in turn connected by port'17 transverse thedrillto a passageway or hole lon itudinal of the drill and extending tothe working end thereof. By means of these passages andports, fluid,when admitted to the opening 8, is carried to the longitudinal hole 18,and thehg-e to the working end of the drill and into the hole beingdrilled. L

It is obvious that .by' this arrangement there is obtained a simplefluid supplying device, wherein the various )arts are readily assembledor separated, and are held in position by the action of the drill, andwherein the provision of any screwgthreaded portions, or of nuts andbolts, is entirely dispensed with. Other advantages will readily occurto those skilled in the art.

Having thus described m invention and illustrated its use, what I 0 turnas new anddesire to secure by Letters Patent is the following 1. fluidsupplying means for rock drills omprising in combination, a drillprovided with .a passage for fluid, a sleeve carried thereby, a secondsleeve mounted on the first sleeve and having a tapered fit therewith,an admissionring mounted on the second sleeve and provided with anadmission passage, and means on the said sleeves to prevent longitudinalmovement of the admission ring, the said sleeves being provided with apassage communicating with the passage in the drill and with theadmission passage.

2. 'A fluid supplying means for rock drills comprising in combination, adrill provided with a passage for fluid and having a tapered section, atapered sleeve carried thereby, a

second sleeve mounted on the'first sleeve and having a tapered. fittherewith sharper than that of the first sleeve with the tapered sectionof the drill, an admission ring mounted onthe second sleeve and providedwith an T-admission passage, and means on the sleeves to preventlongitudinal movement of the admission ring, the said sleeves beingprovided with a passage communicating with the passage in the drill andwith the admission passage.- j

-3. A fluid supplying means for rock drills comprising in combination,a" drill provided with a passage for fiuid and having a tapered sectionthe larger end of which is toward the working end of the drill, a sleevemounted sage communicating with the passage in the drill and withthe'admission passage.

4. In combination with a rock drill provided with a passage for fluid,of 'a sleeve secured against forward longitudinal movement of the drilland having its outer surface tapered, increasing in diameter from rearto front, a stop member at the front end of the sleeve, a second sleevetapered-internally to fit the taper of the first sleeve and provided atits rear. end with a stop, and an admission ring swiveled on thesecond'sleeve between the stops on the first and second sleeves andprovided with an admission passage,lhe said sleeves being provided witha passage communicating with the passage in. the drill and the admissionpassage.

In testimony whereof I have hereunto b subscribed witnesses -)HARLES B.RICHARDS.

si -med my name in the presence of the two Witnesses: V

GEo. H. I'iALL, F. J. CONNELLY.

